Development version of single-file macro is transformed to Trac plugin style.
This is actually a pre-requisite for packaging with translations and others,
i.e. the CSS stylesheet for calendar table, that has moved into a separate file.

blindly bandaiding errors related to 'constraints' and 'labels' -- looks like ticket_data used to return 'labels' but no longer does, and looks like 'constraints' (a dict) has turned into 'clauses' which is a list of dicts

This is the 1st version compatible with Trac 0.12, fixing issues with
the change in time stamp format to POSIX microseconds with Trac 0.12dev-r9210.
Code is essentially the same as committed in SVN r7893 before, but we
have a history and three branches now.
To show this remarkable step I declare the trunk to be version 1.0.0.
But that's just another start. Let's go on from here.

This is the last backwards-kompatible change introduced with introduced by SVN r7893 before.
It fills the gap between jumping just one month and one year quite nicely.
I'm still not satisfied with the optic, but this could be easily fixed,
if someone comes up with a visually more attractiv and - most important -
more intuitive looking choice of charakters for all link labels.
The experiment with temporarily resetting locale settings,
that was left from tests for the unicode fix in previous version, is removed.

The error was encountered in localized environments with Trac 0.12, when
there are i.e. month names containing non-ascii characters like
in the German "März" (engl: March).
It does no harm to have it for English-only environments and Trac 0.11 as well.

This was attempted by adding a private translation module importing
function from Trac's old translation utilities as well as from Babel
directly.
Beware: This was bound to fail, since there is currently no known method
to sanely attach translations to a single-file macro.
So this has to be reworked for the 0.12 branch later to get localized
tool tips when moving over calendar day links.

Compared to 0.2.0 this is a cumulative bug fix release, but it has major improvements,
i.e. to calendar style as well, hence the version number jump.
See changelog for detailed descriptions of the step revisions in between.

This is the version compatible with Trac 0.10, even if announced for 0.11 before.
Changelog is updated to show correct position in line of versions.
And yes, at the time of upload to this repo it was indeed obsoleted by much improved versions.
But never mind, we'll get there soon.